A search for stop production in R-parity-violating supersymmetry has been performed in e(+)p interactions with the ZEUS detector at HERA, using an integrated luminosity of 65 pb(-1). At HERA, the R-parity-violating coupling lambda' allows resonant squark production, e(+)d -> q. since the lowest-mass squark state in most supersymmetry models is the light stop, t, this search concentrated on production of t, followed wither by a direct R-parity-violating decay, or by the guage decay to b (chi) over tilde (+)(1). No evidence for stop production was found and limits were set on lambda'(131) as a function of the stop mass in the framework of the minimal supersymmetric standard model. The results have also been interpreted in terms of constraints on the paramee minimal supergravity model.
Search for stop production in R-parity-violating supersymmetry at HERA
BRUGNERA, RICCARDO;CARLIN, ROBERTO;GARFAGNINI, ALBERTO;A. Longhin;
2007
Abstract
A search for stop production in R-parity-violating supersymmetry has been performed in e(+)p interactions with the ZEUS detector at HERA, using an integrated luminosity of 65 pb(-1). At HERA, the R-parity-violating coupling lambda' allows resonant squark production, e(+)d -> q. since the lowest-mass squark state in most supersymmetry models is the light stop, t, this search concentrated on production of t, followed wither by a direct R-parity-violating decay, or by the guage decay to b (chi) over tilde (+)(1). No evidence for stop production was found and limits were set on lambda'(131) as a function of the stop mass in the framework of the minimal supersymmetric standard model. The results have also been interpreted in terms of constraints on the paramee minimal supergravity model.Pubblicazioni consigliate
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